Keyboard holder



FIG. 1 is a front view of a keyboard holder.

FIG. 2 is a rear view of the keyboard holder.

FIG. 3 is a left side view of the keyboard holder.

FIG. 4 is a right side view of the keyboard holder.

FIG. 5 is a top view of the keyboard holder; and,

FIG. 6 is a bottom view of the keyboard holder. 

CLAIM The ornamental design for a keyboard holder, as shown and described. 